I was having a similar issue with bf6 on steam, the splash screen would pop up for anti cheat and it would close and stop running. I got it working in a really dumb way, had to got to the file location, find the EAAntiCheat.GameServiceLauncher.exe and run it as admin, this will make the splash screen pop up. While the splash screen is open I run the BF6.exe as admin at the same time. It gave me a new error that I had to close out of. then I ran the anti cheat as admin again and the game finally lunched. after that I was able to launch the game from steam as normal with no issues. hope this helps someone
